Panel of a tankless water heater



FIG. 1 is a perspective view from the top, front, left corner of a panel of a tankless water heater;

FIG. 2 is a front elevation view of the panel of the tankless water heater of FIG. 1;

FIG. 3 is an elevation view from the right side of the panel of the tankless water heater of FIG. 1;

FIG. 4 is an elevation view from the left side of the panel of the tankless water heater of FIG. 1;

FIG. 5 is a bottom plan view of the panel of the tankless water heater of FIG. 1; and,

FIG. 6 is a top plan view of the panel of the tankless water heater of FIG. 1.

The broken lines are for illustration only and form no part of the claimed design. 

The ornamental design for a panel of a tankless water heater, as shown and described. 